单项选择题

At the party, everybody congratulated the scientist（）winning the award after his years of hard work.

A．to
B．on
C．at
D．about

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单项选择题
He could repair the car himself but he would rather his son（）it.

A．do
B．to do
C．did
D．has done
单项选择题
She said she（）many good friends since she came to this city.

A．has made
B．makes
C．had made
D．made
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